33113212213 has 4 divisors (see below), whose sum is σ = 33117299820. Its totient is φ = 33109124608.

The previous prime is 33113212201. The next prime is 33113212291. The reversal of 33113212213 is 31221231133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23133801604 + 9979410609 = 152098^2 + 99897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33113212213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33113312213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031628 + ... + 2047861.

It is an arithmetic number, because the mean of its divisors is an integer number (8279324955).

Almost surely, 2^33113212213 is an apocalyptic number.

It is an amenable number.

33113212213 is a deficient number, since it is larger than the sum of its proper divisors (4087607).

33113212213 is an equidigital number, since it uses as much as digits as its factorization.

33113212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087606.

The product of its digits is 648, while the sum is 22.

Adding to 33113212213 its reverse (31221231133), we get a palindrome (64334443346).

The spelling of 33113212213 in words is "thirty-three billion, one hundred thirteen million, two hundred twelve thousand, two hundred thirteen".